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That's what I am thinking too, a full frame swap. Will a regular 1 ton Dodge frame and cummins motor be wide enough and will the motor even fit or should I look into a heavier truck chassis.



Well, I'd suggest measuring possible donor vehicles.
The important stuff is from your feet forward.
Front track, Distance from front axle centerline forward to front of motor, and to front of radiator, distance from axle to firewall, and find out about lowering if that's the look you want. Armed with that, you should next check into possible bodys.
Bigdad's post over in the Truck section would be a good place to start, lots of pictures and info about bigger trucks and meets.
https://board.moparts.org/ubbthreads/showflat.php?Cat=0&Number=5177444